Explain what is the difference between isr & function call?
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Answer / Siddharth Singh
ISR (Interrupt Service Routine) and Function Call are both mechanisms used to handle subroutines in programming, but they differ in their context and usage.nnFunction Call: A normal function call is initiated by the programmer when a specific function is needed during the execution of the main program. The control flow is transferred to the function and upon return, it resumes from where it left off. Function calls can be nested and are not limited in number.nnISR: Interrupt Service Routines (ISR) are specialized functions that handle interrupt requests. Unlike normal function calls, ISRs are triggered by hardware or software events outside the main program flow. They have a fixed execution order (FIFO - First In, First Out) and are limited in number (one for each interrupt source).
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